16-1/2” Diameter X 51" Length Chisel Bit for Cable Tool
Used
51" length
16-1/2" wide should fit inside 18" inside diameter well casing or work
for drilling top hole with spudder rig.
Presumably American manufactured with carbon and/or alloy steels, but unsure if this is Acme, Spang, Gill Rock Drill, Ideco, Trident, Rampp, O.W.S. Co., Keystone or maybe another historical tooling manufacturer.
If you require thread protector(s) on tool joint(s) add another $15.